1 SPDT contact for 2 different Safety Functions:1) SIL 3 for ND load (energized in fail safe state) with ND relay condition (energized in fail safe state)2) SIL 3 for ND load (energized in fail safe state) with NE relay condition (de-energized in fail safe state)
Line input monitoring in-field DIP Switch selectable
Driving input voltage monitoring
Input/Output isolation.
EMC Compatibility to EN61000-6-2, EN61000-6-4, EN61326-1, EN61326-3-1 for safety system
Simplified installation using standard DIN-Rail and plug-in terminal blocks or customized Termination Boards.
The single channel Relay Output, D5091S is a relay module suitable for the switching of safety related circuits, up to SIL 3 level according to IEC 61508:2010 Ed.2 for high risk industries. It provides isolation between input and output contacts. Two mutually exclusive (by DIP-Switch programming) monitoring circuits are provided: 1) line input monitoring, to allow DCS/PLC line monitoring function: when enabled, the module permits a wide compatibility towards different DCS/PLC.
Driving line pulse testing, executed by DCS/PLC, is permitted by a dedicated internal circuit, to prevent relay and LED flickering. 2) low voltage input monitoring: when enabled, the module reflects a high impedance state to the control unit when the driving voltage is below the specified threshold.
